Inter-System Handover Identity Signaling to Reduce Data Delay
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In inter-system handover scenarios, data forwarding delays occur due to the need to forward data packets from a source access network device to a target access network device, which can be resolved by identifying the target secondary access network device as the source device and avoiding unnecessary data forwarding.
Innovation Solution
The method involves determining that the secondary access network device is the same as the source access network device, and providing the source access network device with the identity of the terminal device to prevent data forwarding, thereby reducing transmission delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data packets are forwarded from source access network device to target access network device during inter-system handover, then data transmission continuity is maintained, but data transmission delay increases
Solution Approach 1:
The patent identifies in advance that the target secondary access network device is the same as the source access network device during inter-system handover. Based on this preliminary identification, the system configures the terminal to send data directly to the target access network device without requiring data forwarding, thus eliminating the time delay while maintaining transmission continuity
Solution Approach 2:
Instead of following the conventional data forwarding path (source access network device → source core network → target core network → target access network device), the patent inverts the approach by having the source access network device provide its identity directly to the target access network device, enabling the terminal to send data directly to the target device without forwarding, thus resolving the contradiction between continuity and delay
Data Source
AI summary
This application provides an inter-system handover method and a communication apparatus, and may be applied to an inter-system handover scenario. In a handover process, a source access network device may provide a target access network device with an identity of a terminal device. When determining to add the source access network device as a secondary access network device, the target access network device may send, to the source access network device, a request message for adding a secondary access network device that carries the identity of the terminal device.